Натолкнулся на форуме microbehunter.com на интересную информацию об обсуждаемой Gamma Hungary - вроде как это оказывается разработка именитой оптической фирмы C.P. Göerz с немецкими корнями и отделениями по всему миру, в том числе было и в Санкт-Петербурге с 1905 года:
It was made by C.P. Göerz in Hungary. I gather that after the war, the German C.P. Göerz wss broken up. Part of it went to Meopta. I also read somewhere that Max Pluta had involvement with people st Göerz.
The only ones I have ever seen are marked Göerz 3-D Condenser on the cardboard outer box but not marked on the well made birch dovetailed 11cm. square box inside it. The original kit contains a condenser, presumably an abbe type, an A.1.2 N.A. obviously oil immersion B.F cap, an A. .08 - 1.2 N.A. D.F. cap and a 0.65 N.A. D.F. cap.
The condenser is solidly made , brushed chrome on brass.
The input end has a plate that has two half moon areas with some degree of light absorption separated by a bright slit of just under 5mm width down the middle. Unlike the PZO slit condenser, the Goerz slit's width and geometry are not adjustable. The lone adjustments are that the slit and reduced transmission zones can be collectively rotated against the iris section of the condenser and it's swinging filter tray. Three filters are provided, blue , green and clear : all frosted.
Further, there is a lateral adjustment that moves the slit and absorption plates along the slit axis, producing an oblique effect. Also unlike the PZO condenser, there is no specific polarization component, although a pol filter could be placed in the filter tray.
The body is a 37mm sleeve type and 38.5 and 39.5 mm spring type adapters are included in the kit as is a centering telescope.
The kits were sold in the U.S. by American Optical Company of New York, which is not the same company as American Optical Corporation.They are frequently listed as an AO item for that reason and not as Goerz because both the maker's and importer's names are on the cardboard box and despite having a very different logo and head office, American Optical Company gets tagged as AO.
https://www.microbehunter.com/microscop ... 30#p139727https://ru.wikipedia.org/wiki/Goerz
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